YOU SAID:
im going to kill you while you sleep
INTO JAPANESE
あなたが寝ている間にあなたを殺すつもりだ
BACK INTO ENGLISH
I'm going to kill you while you sleep
INTO JAPANESE
あなたが寝ている間に私はあなたを殺すつもりです
BACK INTO ENGLISH
I'm going to kill you while you sleep
That didn't even make that much sense in English.